mains



R. L. WILLIAMS SELECTIVE RECEIVER Filed Nov a, 1917 i. s? f. Mmsiii c w ALv'E 11 ROBERT L. WILLIAMS. G33 NEW TON. MASSACHUSETTS, ASSIGNOR TO SUBM'ARINE SIGNAL COMPANY, OF FORZLAND, MAINE, A CORPORATION OF MAINE.

SELECTIVE RECEIVER.

Application filed November To all '7/1'10'772. if may macro-'11.

Be it known that I, iionnn'r ii'irrmm of Newton. in tho county of .vliddlcscx llll State of :ilassachusc ts, a ciii'lzcn' i l ll l uiteil States. hair invented a now and fnl improvement in Selective i? rers. oi which the Following is a hli'l fllli'llll ili.

lcly invention rclatcs lo upon lot rcceiving signalsor sounds silt in lilo lorm of compressional or mund rum-cs. and l'i'ai:-xforming thcm into corrcspoiuling clcrlrical ares in a circuit containing an indicator. i. 0.. a telephone receiver. galvzmoun-icr. or the like. it relates particularly to moans comprising a scrics of vibrator circuit closers each tuned to a (info pi from that of all the others whereby each will rr-s muil actively to close its circuit only to signals of a .simila r pitch to its own, By means of my invention, therefore, while signals may he received from a number of sources each separately tuned, for example. a number of ships each having a rliil'crent periodicity, each signal will excite a reed tuned to its own frequency.

My invention also comprises the arrangen emt-mf sire-n" an apparatus in a watertight casing which maybe suspended in the open water -in a tank on board ship and so be able "to receive such signals with the least loss of efficiency.

My invention will be understood by refer-- ence to the drawings. in which it is shown in its preferred form.

Fig. 1 being a vertical section of mechanism embodying my invention,

Fig. 2 being an enlarged horizontal sec tion thcrof, and

Fig. 3 being a detail of the reed circuit closers.

The casing which encloses the mechanism especially embodvinemy invention corn" prises two members A. A which are bolted togethcr by bolts (z. and provided with a gasket (1. or other packing to make the joint Watertight.

The member A carries eves by one of which 0, the casing is conncr'ted by the chain (7 with the weight 7 and by the othe' ri. the casing is connected with the submerged buoy D by the chain l3.

Within the casing: and electrically connected thereto is the metal plate 3'; from which progect a number or" teeth reeds 0,

8. 1917'. Serial N0. 200,838.

each of a diiicrcnt length from lhe others. or olherr-isc I'UllFl'l'lll'lPll whereby each will \i rzlc :il l lill' -rcul l'rci lu-ncy from ail tho l. and ach will o upon liic in i i olsouu'l wawsoi lls own i'zci ucn reed has n mirbon point 1") contact with a raroon terminal 1; for

i) yfatc of insulating material which ill}. .aouutcd on the part .U'of in this plate F are mouutcd lcrmi: als (a. rcl'crabli inadc or tipped with carbon. equal in mm 1' to {he lr'rlb b on tho lc ii and ea h ifCkllifll o iwilrin our of will tooth and in Hi'il pro.-\i.'u iy ihrrclo that !l!l:1"ll"fivibration of such ioolh such as might be causwi my sound \ibral ous of its nulural l'rc-r ucnov will cause -."-lcrl'i'ir:ii cor.- tart belwccn carbon point on such tooth and its opposing l'tllluill l"l'li\llli'll,

Each terminal 1' is ('Hiilblll'ifll by a spring for otherwise with a circuit. individual or preferably as shown. comprising a wire whim with the wire 0 connected to the casing .U may form :1 cable 0" protected, by in sulation and running through the water or otherwise to the indicators and battery zlll the observation station.

A' is u stufliu c box through which the cubic. i'uisscs. (his being necessary to. keep the interior of the (zlr lllif irre from water.

The character of such observation station and theindicating instruments are so well known as not to nerd further explanation or illustration. Such an instrument is shown at T in Fig. 1.

l prefer to use carbon contacts but the contacts may be made of other material offcctive for that purpose. In this and othrr ways the details or" my invention may he changed without however. departing from its spirit.

lVhwt I claim as an? invention is:

1. device for receiving submarine Sig; nals comprising a watertight casing and means for anchoring it below the surface of the i said casing having mounted withand said contacts .vh-z-rsy vibra- B1 any of said will the said roe tlon set 11 lEfi circuit at the appropriate contacts and be indicated at the indicator.

fl device for reeeiving submarine sip;- nais comprising a watertighteasing means for anchoring said casing; below the surfaee of the water, a buoy for sustaining, said easing: above its amber-2:1 means, a series of reeds of different lengths. forming eleetrie terminals, within said casing. a plate of insulating material mounted adjacent said reeds within said casing. a serie of eontarts mounted on said insulating: p te and each so located as to be engaged by a reed when sueh reed is in \llJliltlOlL and an indieator eleetrieallfi onneeted with all of said reeds and said'contaets: whereb vibration set up in any one of said reeds will close th rir Quit at a 'eontaet t-(lilvflmlltllllfl to a r'requeney to whieh its reed is responsive. and such result be denoted by said indicator.

A device for rewiring: submarine signals (tomprisin a nntei tight casing means for an horin; said casing below thesurtaee' of the water. a buoy for sustaining: said easing above its anehoring: means. a series of reds oiditi'erent lengths. forming eleetri terminals within vsaid easing; a. plate of insulatin; material mounted adjacent said reeds, within said casing, a series of adpistable contacts mounted on said insulating plate and. each so located as to he engaged by a reed whenvsueh reed is in vibration. and an indieator trieallv connected with all of said reeds and said dontaets; wliere'b} vibration set up in any one of said reeds will close the circuit at a eontai't correspondin; to a frequene} to which its reed is responsive, and such result be denoted by said indicator.

4'. A device for receiving submarine signals eoniprising a water-tight easing, means for anchoring said easing below the surface oi the water, a buoy for sustaining said easing above its; anehorin; means, aseries of reeds ol difi'erent lengths, forming elertrie terminals. withinsaid easing. said reeds beiirg tipped with earbon, a plate of insulating material mounted adjaeent saitl reeds, withinsaid casing, a series of contaets, also tipped with carbon. mounted on said insulating plate and each so located as to be engaged by a reed when such reedis in vibra tion and an indicator electrically connected with all of said reeds and said contacts; whereby vibration set up in any one of said reeds will close theieireuit at, a Contact eor- 1'0Spo11dlli; i0 a frequency to which its need is responsive, and sueh 'resultbe denoted by said indicatoix.

ROBERT- L. W ILLIAJJS.

elee 

